Mechanical key unlocking system

Abstract

The invention provides a mechanical key unlocking system. The mechanical key unlocking system comprises high-voltage switch locks, low-voltage switch locks, a key interaction box, a front door lock and a back door lock, wherein the high-voltage switch locks are installed on high-voltage switches, and the high-voltage switch lock on an nth transformation branch line is matched with a key An; the low-voltage switch locks are installed on low-voltage switches, and the low-voltage switch lock on the nth transformation branch line is matched with a key Bn; the key interaction box is arranged at the position close to a dry-type transformer and is formed by coupling two lock inlet blocks and two lock outlet blocks, the two lock inlet blocks are matched with the key An and the key Bn respectively, and a key Cn and a key Dn are coupled to the two lock outlet blocks on the nth transformation branch line respectively; the front door lock and the back door lock are installed on a front door and a back door respectively and are matched with the key Cn and the key Dn respectively; the key Cn and the key Dn are synchronously decoupled from the lock outlet blocks through the key An and the key Bn. By means of the mechanical key unlocking system, dry-type transformer overhauling procedures are solidified to a set of interlocking system in the modes forced unlocking and key exchanging, and error operation can be accordingly avoided completely.

Description

technical field [0001] The invention relates to a dry-type transformer door opening and maintenance safety interlock device in places such as local lighting, high-rise buildings, airports, docks, and CNC mechanical equipment, and more particularly relates to a mechanical key locking system. Background technique [0002] Dry-type transformer refers to the transformer whose iron core and winding are not immersed in insulating oil. It is widely used in local lighting, high-rise buildings, airports, docks, CNC mechanical equipment and other places. Dry-type transformers need frequent maintenance during use. Before overhauling the dry-type transformer, it is necessary to cut off the power supply of the low-voltage side, and then cut off the power supply of the high-voltage side, and then open the door of the dry-type transformer for maintenance. The current maintenance process of dry-type transformers is as follows: first, disconnect the low-voltage side power supply correspondin...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a mechanical key locking system, so as to solve the problem of easy misoperation in the prior art when overhauling dry-type transformers

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